Polar Heart Rate Monitor Elastic Replacement Transmitter Strap for T31 or T61 (Size Small 28-40 Inches)

Continuous Heart Rate with 3 Auto Intensity Levels based on your maximum heart rate
Auto or custom set heart rate zones with visual and audible alerts in target zones
24 hour chronograph with 9 run memory with data recall

The first and only watch that can calculate your heart rate and calories burned while exercising… without the need of a chest strap
It has been designed to calculate the calories burned and pulse rate of an AVERAGE. Individual based on preset age, weight, and sex
Based on your preset information memorized by the watch, the time on the counter, and your heart rate, the calorie watch is able to determine how many calories you have burned during your workout

Displays calories burned
The EnergyPointer tells you if the main effect of your training is fitness improvement or fat burning
Comes with comfortable textile transmitter and coded heart rate transmission to avoid cross-talk

Tracks heart rate and calories burned in real-time while you exercise
Wahoo Fitness Burn & Burst Training Program: Eight week training program designed to burn fat and improve performance; Free within the iOS Wahoo Fitness App
Dual Technology: Both ANT+ and Bluetooth 4.0 capabilities allow the TICKR to connect to both GPS watches, iPhone 4S and later models, and select Android devices with Android 4.3 operating system or newer